<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img
          src="../assets/test.jpg"
          style="width:61px;height:56px"
          alt="logo"
        />
        <span>电商后台管理系统</span>
      </div>
      <el-button @click="loginOut">退出</el-button></el-header
    >
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧面栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu
          background-color="#fff"
          text-color="#17b3a3"
          active-text-color="#17b3a3"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
          >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id" >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- welcome -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [], // 左侧菜单数据
      iconsObj: { // 图标集合
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 是否激活的地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    // 从sessionStorage中取出地址
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    loginOut () {
      // 清空token
      window.sessionStorage.clear()
      // 跳转到登陆页面
      this.$router.push('/login')
    },
    /**
     * 获取菜单数据
     */
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      console.log(this.menuList)
    },
    /* 菜单折叠和展开 */
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    /* 保存连接激活状态 */
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
  background-color: #17b3a3;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  color: #fff;
  align-items: center;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #fff;
  .el-menu {
    border-right: none;
    box-sizing: border-box;
  }
}
.el-main {
  background: #fff;
  border-bottom: 1px solid #d8dce5;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #f0f0f0;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  /* 间距 */
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
